FOR$IOS_FORVARMIS². An attempt was made either to read or write a real variable with an integer field descriptor (I, L, O, Z, B), or to read or write an integer or logical variable with a real field descriptor (D, E, or F). To suppress this error message, see the description of /check:noformat.

FOR$IOS_SYNERRFOR. A syntax error was encountered while the RTL was processing a format stored in an array or character variable.

FOR$IOS_OUTCONERR². During a formatted output operation, the value of a particular number could not be output in the specified field length without loss of significant digits. When this situation is encountered, the overflowed field is filled with asterisks to indicate the error in the output record. If no ERR address has been defined for this error, the program continues after the error message is displayed. To suppress this error message, see the description of /check:nooutput_conversion.

FOR$IOS_INPCONERR². During a formatted input operation, an invalid character was detected in an input field, or the input value overflowed the range representable in the input variable. The value of the variable was set to zero.

FOR$IOS_FLTINV. During an arithmetic operation, the floating-point values used in a calculation were invalid for the type of operation requested or invalid exceptional values. For example, the error can occur if you request a log of the floating-point values 0.0 or a negative number. For certain arithmetic expressions, specifying the /check:nopower option can suppress this message.

FOR$IOS_OUTSTAOVE. An output statement attempted to transfer more data than would fit in the maximum record size.

FOR$IOS_INPSTAREQ. Attempted to read more data than exists in a record with an unformatted READ statement or with a formatted sequential READ statement from a file opened with a PAD specifier value of 'NO'.

FOR$IOS_VFEVALERR². The value of a variable format expression was not within the range acceptable for its intended use; for example, a field width was less than or equal to zero. A value of 1 was assumed, except for a P edit descriptor, for which a value of zero was assumed.

FOR$IOS_INTOVF. During an arithmetic operation, an integer value exceeded byte, word, or longword range. The result of the operation was the correct low-order part. See the Data Representation chapter in the Programmer's Guide for ranges of the various integer data types. Consider specifying a larger integer data size (modify source program or, for an INTEGER declaration, possibly use the /integer_size:size option).

FOR$IOS_INTDIV. During an integer arithmetic operation, an attempt was made to divide by zero. The result of the operation was set to the dividend, which is equivalent to division by 1.

FOR$IOS_FLTOVF. During an arithmetic operation, a floating-point value exceeded the largest representable value for that data type. See the Data Representation chapter in the Programmer's Guide for ranges of the various data types.

FOR$IOS_FLTDIV. During a floating-point arithmetic operation, an attempt was made to divide by zero.

FOR$IOS_FLTUND. During an arithmetic operation, a floating-point value became less than the smallest finite value for that data type. Depending on the values of the /fpe:n option, the underflowed result was either set to zero or allowed to gradually underflow. See the Data Representation chapter in the Programmer's Guide for ranges of the various data types.

FOR$IOS_SIGFPE. A floating-point exception occurred. Possible causes include:

• Division by zero
• Overflow
• An invalid operation, such as subtraction of infinite values, multiplication of zero by infinity without signs), division of zero by zero or infinity by infinity
• Conversion of floating-point to fixed-point format when an overflow prevents conversion

FOR$IOS_SUBRNG. An array reference was detected outside the declared array bounds.

FOR$IOS_SIGTERM. The process received a signal requesting termination of this process. Determine the source of this software termination signal.

FOR$IOS_SIGQUIT. The process received a signal requesting termination of itself. Determine the source of this quit signal.

FOR$IOS_FLOCONFAI. The attempted unformatted read or write of nonnative floating-point data failed because the floating-point value:

• Exceeded the allowable maximum value for the equivalent native format and was set equal to infinity (plus or minus)
• Was infinity (plus or minus) and was set to infinity (plus or minus)
• Was invalid and was set to not a number (NaN)

Very small numbers are set to zero (0). This error could be caused by the specified nonnative floating-point format not matching the floating-point format found in the specified file. Check the following:

• The correct file was specified.
• The record layout matches the format Compaq Fortran is expecting.
• The ranges for the data being used (see Data Representation).
• The correct nonnative floating-point data format was specified (see Converting Unformatted Numeric Data).

FOR$IOS_CANSTAFILE. Make sure correct file and unit were specified.